Vitamins do not provide energy, nor do they construct or build any part of the body. They are needed for ______ foods into energy and body maintenance.

A．The shortage of energy and air pollution.
B．The shortage of energy and the land to hold garbage.
C．Air pollution and the shortage of fossil fuel.
D．Air pollution and the shortage of land to hold garbag

A. I fully appreciate your invitation.
B. Sorry, I can’ t take it.
C. I think it won’ t be necessary.
D. I’d love to, but I have a prior appointment.